更新libclamav库1.0.0版本

clamav/libclamav_rust/.cargo/vendor/libc/build.rs

@@ -0,0 +1,174 @@
+use std::env;
+use std::process::Command;
+use std::str;
+
+fn main() {
+    // Avoid unnecessary re-building.
+    println!("cargo:rerun-if-changed=build.rs");
+
+    let (rustc_minor_ver, is_nightly) = rustc_minor_nightly().expect("Failed to get rustc version");
+    let rustc_dep_of_std = env::var("CARGO_FEATURE_RUSTC_DEP_OF_STD").is_ok();
+    let align_cargo_feature = env::var("CARGO_FEATURE_ALIGN").is_ok();
+    let const_extern_fn_cargo_feature = env::var("CARGO_FEATURE_CONST_EXTERN_FN").is_ok();
+    let libc_ci = env::var("LIBC_CI").is_ok();
+
+    if env::var("CARGO_FEATURE_USE_STD").is_ok() {
+        println!(
+            "cargo:warning=\"libc's use_std cargo feature is deprecated since libc 0.2.55; \
+             please consider using the `std` cargo feature instead\""
+        );
+    }
+
+    // The ABI of libc used by libstd is backward compatible with FreeBSD 10.
+    // The ABI of libc from crates.io is backward compatible with FreeBSD 11.
+    //
+    // On CI, we detect the actual FreeBSD version and match its ABI exactly,
+    // running tests to ensure that the ABI is correct.
+    match which_freebsd() {
+        Some(10) if libc_ci || rustc_dep_of_std => {
+            println!("cargo:rustc-cfg=freebsd10")
+        }
+        Some(11) if libc_ci => println!("cargo:rustc-cfg=freebsd11"),
+        Some(12) if libc_ci => println!("cargo:rustc-cfg=freebsd12"),
+        Some(13) if libc_ci => println!("cargo:rustc-cfg=freebsd13"),
+        Some(14) if libc_ci => println!("cargo:rustc-cfg=freebsd14"),
+        Some(_) | None => println!("cargo:rustc-cfg=freebsd11"),
+    }
+
+    // On CI: deny all warnings
+    if libc_ci {
+        println!("cargo:rustc-cfg=libc_deny_warnings");
+    }
+
+    // Rust >= 1.15 supports private module use:
+    if rustc_minor_ver >= 15 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_priv_mod_use");
+    }
+
+    // Rust >= 1.19 supports unions:
+    if rustc_minor_ver >= 19 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_union");
+    }
+
+    // Rust >= 1.24 supports const mem::size_of:
+    if rustc_minor_ver >= 24 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_const_size_of");
+    }
+
+    // Rust >= 1.25 supports repr(align):
+    if rustc_minor_ver >= 25 || rustc_dep_of_std || align_cargo_feature {
+        println!("cargo:rustc-cfg=libc_align");
+    }
+
+    // Rust >= 1.26 supports i128 and u128:
+    if rustc_minor_ver >= 26 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_int128");
+    }
+
+    // Rust >= 1.30 supports `core::ffi::c_void`, so libc can just re-export it.
+    // Otherwise, it defines an incompatible type to retaining
+    // backwards-compatibility.
+    if rustc_minor_ver >= 30 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_core_cvoid");
+    }
+
+    // Rust >= 1.33 supports repr(packed(N)) and cfg(target_vendor).
+    if rustc_minor_ver >= 33 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_packedN");
+        println!("cargo:rustc-cfg=libc_cfg_target_vendor");
+    }
+
+    // Rust >= 1.40 supports #[non_exhaustive].
+    if rustc_minor_ver >= 40 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_non_exhaustive");
+    }
+
+    if rustc_minor_ver >= 51 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_ptr_addr_of");
+    }
+
+    // Rust >= 1.37.0 allows underscores as anonymous constant names.
+    if rustc_minor_ver >= 37 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_underscore_const_names");
+    }
+
+    // #[thread_local] is currently unstable
+    if rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_thread_local");
+    }
+
+    // Rust >= 1.62.0 allows to use `const_extern_fn` for "Rust" and "C".
+    if rustc_minor_ver >= 62 {
+        println!("cargo:rustc-cfg=libc_const_extern_fn");
+    } else {
+        // Rust < 1.62.0 requires a crate feature and feature gate.
+        if const_extern_fn_cargo_feature {
+            if !is_nightly || rustc_minor_ver < 40 {
+                panic!("const-extern-fn requires a nightly compiler >= 1.40");
+            }
+            println!("cargo:rustc-cfg=libc_const_extern_fn_unstable");
+            println!("cargo:rustc-cfg=libc_const_extern_fn");
+        }
+    }
+}
+
+fn rustc_minor_nightly() -> Option<(u32, bool)> {
+    macro_rules! otry {
+        ($e:expr) => {
+            match $e {
+                Some(e) => e,
+                None => return None,
+            }
+        };
+    }
+
+    let rustc = otry!(env::var_os("RUSTC"));
+    let output = otry!(Command::new(rustc).arg("--version").output().ok());
+    let version = otry!(str::from_utf8(&output.stdout).ok());
+    let mut pieces = version.split('.');
+
+    if pieces.next() != Some("rustc 1") {
+        return None;
+    }
+
+    let minor = pieces.next();
+
+    // If `rustc` was built from a tarball, its version string
+    // will have neither a git hash nor a commit date
+    // (e.g. "rustc 1.39.0"). Treat this case as non-nightly,
+    // since a nightly build should either come from CI
+    // or a git checkout
+    let nightly_raw = otry!(pieces.next()).split('-').nth(1);
+    let nightly = nightly_raw
+        .map(|raw| raw.starts_with("dev") || raw.starts_with("nightly"))
+        .unwrap_or(false);
+    let minor = otry!(otry!(minor).parse().ok());
+
+    Some((minor, nightly))
+}
+
+fn which_freebsd() -> Option<i32> {
+    let output = std::process::Command::new("freebsd-version").output().ok();
+    if output.is_none() {
+        return None;
+    }
+    let output = output.unwrap();
+    if !output.status.success() {
+        return None;
+    }
+
+    let stdout = String::from_utf8(output.stdout).ok();
+    if stdout.is_none() {
+        return None;
+    }
+    let stdout = stdout.unwrap();
+
+    match &stdout {
+        s if s.starts_with("10") => Some(10),
+        s if s.starts_with("11") => Some(11),
+        s if s.starts_with("12") => Some(12),
+        s if s.starts_with("13") => Some(13),
+        s if s.starts_with("14") => Some(14),
+        _ => None,
+    }
+}